Question

我试图在我的Rest API中实现错误处理并使用Postman进行测试，但是当我给出错误的路径时，postman返回404但返回404 HTML。我正在使用@ControllerAdvice作为全局异常处理程序。

@ControllerAdvice类是RestResponseEntityExceptionHandler.java

@ControllerAdvice
public class RestResponseEntityExceptionHandler  
  extends ResponseEntityExceptionHandler {

    @ExceptionHandler(value  = { IllegalArgumentException.class, IllegalStateException.class })
    protected ResponseEntity<Object> handleConflict(
      RuntimeException ex, WebRequest request) {
        String bodyOfResponse = "This should be application specific";
        return handleExceptionInternal(ex, bodyOfResponse, 
          new HttpHeaders(), HttpStatus.CONFLICT, request);
    }
}

有人告诉我，默认情况下，Spring Boot应该返回这样的内容

{
  "timestamp": 1436442596410,
  "status": 404,
  "error": "Not Found",
  "message": "No message available",
  "path": "/item"
}

我给它的不存在路径是

http://localhost:8080/Assignment2C/breweriessdfsdf

我得到的答复是

    <!doctype html>
<html lang="en">

<head>
    <title>HTTP Status 404 – Not Found</title>
    <style type="text/css">
        h1 {
            font-family: Tahoma, Arial, sans-serif;
            color: white;
            background-color: #525D76;
            font-size: 22px;
        }

        h2 {
        font-family: Tahoma, Arial, sans-serif;
        color: white;
        background-color: #525D76;
        font-size: 16px;
    }

    h3 {
        font-family: Tahoma, Arial, sans-serif;
        color: white;
        background-color: #525D76;
        font-size: 14px;
    }

    body {
        font-family: Tahoma, Arial, sans-serif;
        color: black;
        background-color: white;
    }

    b {
        font-family: Tahoma, Arial, sans-serif;
        color: white;
        background-color: #525D76;
    }

    p {
        font-family: Tahoma, Arial, sans-serif;
        background: white;
        color: black;
        font-size: 12px;
    }

    a {
        color: black;
    }

    a.name {
        color: black;
    }

    .line {
        height: 1px;
        background-color: #525D76;
        border: none;
    }
</style>
</head>

    <body>
    <h1>HTTP Status 404 – Not Found</h1>
    <hr class="line" />
    <p><b>Type</b> Status Report</p>
    <p><b>Description</b> The origin server did not find a current representation for the target resource or is not
        willing to disclose that one exists.</p>
    <hr class="line" />
    <h3>Apache Tomcat/9.0.26</h3>
</body>

</html>

我正在使用的spring boot依赖项是

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-dependencies</artifactId>
    <version>2.2.6.RELEASE</version>
    <type>pom</type>
    <scope>provided</scope>
</dependency>

我的控制器类是Breweries_Controller

  @RestController
@RequestMapping("/breweries")
public class Breweries_Controller {

    @Autowired
    Breweries_Service service;

    @GetMapping(produces = MediaTypes.HAL_JSON_VALUE)
    public Resources<Breweries> getAllBreweries(@RequestParam(name = "limit", required = false) Integer limit , @RequestParam(name = "offset", required = false) Integer offset) {

        List<Breweries> allBreweries = service.getAllBreweries();

        if(limit == null && offset == null){
            limit = 20;
            offset = 0;
        }
        List<Breweries> paginatedList = allBreweries.subList(offset, offset + limit);

        for (Breweries b : allBreweries) {
            int id = b.getResourceId();
            Link self = linkTo(this.getClass()).slash(id).withSelfRel();
            b.add(self);
            linkTo(methodOn(this.getClass()).getBrewerie(id));
        }
        Link link = linkTo(this.getClass()).withSelfRel();
        Resources<Breweries> result = new Resources<Breweries>(paginatedList, link);

        return result;

    }

    @GetMapping(value = "/{id}", produces = MediaTypes.HAL_JSON_VALUE)
    public Resource<Breweries> getBrewerie(@PathVariable("id") int id) {
        Resource<Breweries> brewerie = new Resource<Breweries>(service.getBrewerieById(id));
        ControllerLinkBuilder linkTo = linkTo(methodOn(this.getClass()).getAllBreweries(5, 50));
        brewerie.add(linkTo.withRel("all-breweries"));
        return brewerie;
    }

    @DeleteMapping(value = "/{id}")
    @ResponseStatus(HttpStatus.OK)
    public void delete(@PathVariable("id") int id) {
        Breweries brewerie = service.getBrewerieById(id);
        service.deleteBrewerie(brewerie);
    }

    @PostMapping
    @ResponseStatus(HttpStatus.CREATED)
    public void create(@RequestBody Breweries b) {
        b.setResourceId(0);
        b.setAddUser(0);
        b.setLastMod(new Date());
        service.addBrewerie(b);
    }

    @PutMapping(value = "/{id}")
    @ResponseStatus(HttpStatus.OK)
    public void update(@PathVariable("id") int id, @RequestBody Breweries b) {
        b.setResourceId(id);
        b.setAddUser(0);
        b.setLastMod(new Date());
        service.editBrewerie(b);
    }
}

Answer 1

404意味着spring mvc无法找到合适的端点（控制器+方法）来运行您的请求。

@ControllerAdvice仅在实际调用了该方法且有异常的情况下才相关。但是在您的情况下，流量甚至无法到达控制器，这就是控制器建议无效的原因。

您可以通过创建实现ErrorController的控制器来自定义错误页面。

此信息并不能严格回答问题，但是我意识到那是您真正需要解决的问题，因此我只在相关教程中发布link。

@ControllerAdvice没有捕获Rest API异常

1 个答案: